from multiprocessing import Process
from threading import Thread
import time
class MyThread(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.__data = ''
    def run(self):
        print("Hi from thread")
        print(self.__data)
class Aclass():
    def __init__(self):
        self._t = MyThread()
        self._t.daemon = True
    def start(self):
        self._t.start()
        print("thread started")
if __name__ == '__main__':
    t = Aclass()
    p = Process(target = t.start )
    p.start()
    time.sleep(2)

 File "/usr/lib/python3.13/multiprocessing/process.py", line 313, in _bootstrap
    self.run()
    ~~~~~~~~^^
  File "/usr/lib/python3.13/multiprocessing/process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
    ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kali/impacket/master/impacket/tests/SMB_RPC/test_bug_process_thread.py", line 18, in start
    self._t.start()
    ~~~~~~~~~~~~~^^
  File "/usr/lib/python3.13/threading.py", line 973, in start
    _start_joinable_thread(self._bootstrap, handle=self._handle,
    ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                           daemon=self.daemon)
                           ^^^^^^^^^^^^^^^^^^^
RuntimeError: thread already started